Abstract:
:Prey utilisation at low prey densities was determined for third instar Cueta sp., Furgella intermedia (Markl) and Palpares annulatus (Stitz) larvae in terms of wet weight, dry weight, energy and nutrients. Prey utilisation was similar to other insects on a wet weight (42-47%), dry weight (46-49%), energetic (40-58%) and nutritive basis (62-79%). Lipids (33-36%) provided energetically the highest contribution of the nutrients ingested. The quantities of water, proteins, nucleic acids, lipids and carbohydrates extracted by the antlion larvae were in proportion to their availability in their prey, the Hodotermes mossambicus larvae. The quantities of nutrients extracted by the antlion larvae at low prey densities were not significantly influenced by the differences in mandible size, antlion body weight or the trapping method (building a pit or not) of the antlion species. It is proposed that a low metabolic rate and the accumulation of fat reserves, and not the extent of prey utilisation, enable P. annulatus larvae to tolerate a 123-d starvation period in which 22.3% of their body weight is lost.
journal_name
J Insect Physioljournal_title
Journal of insect physiologyauthors
De K Van Der Linde TC,Van Der Westhuizen MC,Van Zyl Adoi
10.1016/s0022-1910(97)00020-6keywords:
subject
Has Abstractpub_date
1997-07-01 00:00:00pages
605-613issue
7eissn
0022-1910issn
1879-1611pii
S0022-1910(97)00020-6journal_volume
43pub_type
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